package com.woniu.p2p.controller;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class AlipayUtil {

	/**
	 * 阿里巴巴支付宝沙箱网页支付
	 * @param req    
	 * @param response  
	 * @throws ServletException
	 * @throws IOException
	 */
	public static void payment(HttpServletRequest req, HttpServletResponse response,String orderId, String orderAmount,String orderSubject,String orderDescription) throws ServletException, IOException  {
		//获得初始化的AlipayClient
	    AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, 
	    		                   AlipayConfig.merchant_private_key, "json", AlipayConfig.charset,
	    		                   AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
	    //设置请求参数
	    AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
	    alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
	    alipayRequest.setReturnUrl(AlipayConfig.return_url);
	    //商户订单号，商户网站订单系统中唯一订单号，必填
	    String out_trade_no = orderId;
	    //付款金额，必填
	    String total_amount = orderAmount;
	    //订单名称，必填
	    String subject = orderSubject;
	    //商品描述，可空
	    String body = orderDescription;
	    alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\"," 
	            + "\"total_amount\":\""+ total_amount +"\"," 
	            + "\"subject\":\""+ subject +"\"," 
	            + "\"body\":\""+ body +"\"," 
	            + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

	    //请求
		try {
			String result = alipayClient.pageExecute(alipayRequest).getBody();
			response.setContentType("text/html;charset=" + AlipayConfig.charset);
	        response.getWriter().write(result);//直接将完整的表单html输出到页面
	        response.getWriter().flush();
	        response.getWriter().close();
		} catch (AlipayApiException e) {
			e.printStackTrace();
			response.getWriter().write("捕获异常出错");
	        response.getWriter().flush();
	        response.getWriter().close();
		}
	}
}
